1. Turn upside down the cartomizer, and then screw off the bottom hardware.
2. Use the syringer or dropper to fill less than 3ml e-liquid into the space between the glass tank and the center metal tube. Do not overfill it.
3. Carefully screw on the bottom hardware, connect it with the battery and enjoy it.

How to control the Airflow
You can rotate the airflow control valve to choose the most comfortable one.

How to replace the coil unit/coil head
Turn upside down the cartomizer, then screw off the connector. Take out the old coil unit from the bottom base, replace with new one. So easy!
Sellers/Distributors please do let your customers know how to use this cartomizer correctly.